When you first open the Play Console it can be rather overwhelming, and it is difficult sometimes to see the wood for the trees. Because they are so many options and different varieties of app nobody is going to write a full manual/tutorial to guide you through, but here are some steps to get you started ...
- On the "All Apps" page click on the "Create App" button (top right) and answer the questions.
- Once you have created an app the first area to work on is "Store Presence" and the "Main Store Listing". Note that, as a minimum, you only have to provide (as far as I recall) three sample screen shots and a main shop window image, plus an app description and answers to a few questions
- The final essential step is in the "Production" area where you "Create new release" (button top right).
If you hit a problem then that is the time to ask for specific help, but I agree with
@Shelby - most questions have already been asked and answered somewhere.